john brennan was pressed hard on the use of drones and enhanced interrogation techniques by members of the senate intelligence committee. government memos leaked earlier this week showed drones had been cleared for use against u.s. citizens suspected of working as u.s. terrorists. nbc's tracie potts is live. good morning. >> reporter: good morning, everyone. in his hearing, brennan strongly defended the use of drones but he distanced himself from questionable interrogation tactics used on terror suspects. >> truth, the full truth and nothing but the truth. >> reporter: it looks like john brennan is gaining the support of several lawmakers, on drone attacks and even americans. at least three killed so far. >> any american who did that should know well that they in fact are part of an enemy against us and that the united states will do everything possible to destroy that enemy to save american lives. >> reporter: drones are used against imminent threats, he said, not as payback. but some are still concerned if it's legal and asked what if the cia takes out the wrong person. >> we've got